Is it possible in mongodb to use an async function to populate the $set field?

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Each document in my collection has a status field that needs to be updated periodically with an async api call that fetches the document's current status by its id.

For example:

db.items.update({}, { $set: { status: getStatusById(id?) } }, handleResult);

I cannot just select all ids at once as my process runs out of memory if I do that. There are over 6 million documents in the collection.

If there is no shortcut, another approach would be to step through the database 100 at a time but I'm not sure if that's the best approach here.

I am looking for something analogous to docs.map(getStatusById) in JS only with a mongodb collection.

getStatusById makes an api call to a 3rd party resource -- I need to take results from that and add to doc.

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